Concrete mixer



J. W. HELTZEL.

CONCRETE MIXER.

APPLICATION man JULY 17,1920.

13273955; PatentedSept. 5, 1922.

s SHEETS-SHEET x.

i g W I o I fitter/"ego r J. W. HELTZEL.

CONCRETE MIXER- APPLLCATION FILED JULY 17.1920.

Patented Sept. 5, 1922.

3 SHEETSSHEET 3.

Patented Sept. 5, 19226 st s r rein.

JOSEPH W. HEL'LZEL, OF WARREN, OHIO.

CONCRETE MIXER,u

Application filed July 17,

To all whom it may concern:

Be it known that I, JosnrH W. HELTZEL, a citizen of the United States,residing at Warren, in the county of Trumbull and State of Ohio, haveinvented a new and useful Concrete Mixer, of which the following is aspecification.

This invention relates to agitators and more particularly to an improvedconcrete mixer adapted to be manually operated to mix variousingredients such as concrete or the like, the device being constructedto be manually manipulated to mix a maximum quantity of concrete by handin the shortest possible time consistent with a device or machine of itstype adapted to be manually manipulated, and which is relativelyinexpensive and durable.

A further object of the invention is to provide an improved concretemixer of the type employing a movement on the principle ofthe walkingbeam in combination with an actuating cable and drum therefor, so as tooscillate a mixing drum or receptacle of elongated form, whereby thewater may be caused to drop first and then the aggregate and other heavycontents on top of the water, thus obtaining a thorough and rapid mixingwith a minimum of labor.

A further object of the invention is to pro vide an improved concretemixer having a novel construction of mixing drum supported foroscillation together'with improved means for actuating the same and forcharging and filling and emptying the contents of the drum after thesame has been mixed.

With the above and other objects in view which will appear as thedescription proceeds, the invention resides inthe combination andarrangement of parts and in the details of construction hereinafterdescribed, and claimed, it being understood that within the scope ofwhat is claimed, changes in the precise embodiment of the inventionshown can be made without departing from. the spirit of the invention.

In the accompanying drawings Figure 1 isa side elevation of my improvedconcrete mixer V H Figure 2 is a longitudinal sectional view thereofvertically of the mixer;

Figure 3 is an end elevation; and

Figure 4 is a vertical sectional view taken on the line 4-4 of Figure 1.M

Referring to the drawings in detail, in

1920. Serial No. 396,990.

which like reference characters designate corresponding parts throughoutthe several v1ews, my improved mixer is shown as comprising an elongatedreceptacle or drum 10 preferably of tubular outline and cross-section,mounted intermediately of its ends upon transverse pivot or rocker shaft11 form- 1ng a pin or trunnion whichsupports the mixing drum and whichmay extend entirely through. the drum or otherwise, as desired. The endsof this shaft or trunnion are rotatably mounted in a frame structureincluding spaced uprights or supporting posts 12 which are arranged inspaced parallel relation upon a base or supports 13 and held rigidly insuch position through the medium of oppositely inclined diagonal braces14 extending between said uprights and the base near the outer endsofthe latter. The base includes transverse connecting or end members 15so as to render the structure rigid and to connect the side membersforming the base proper.

A pair ofposts 16 extend from the base near the lower ends of theuprights at right angles to the braces 14 and extend upwardly beyond thepoint of intersection, where the upper extremities of said limit or stopposts are recessed, as indicatedat 17 for a purpose to be hereinaftermore particularly specified. Adjacent to the posts 16 and connectedthere to and to the braces 14 are transverse connecting members 18forming blocks or supports for sheaves or pulleys 19, rotatably mountedin brackets 20 carried by said supports upon the upper faces thereof,preferably below the posts.

-At the sides of the drum or receptacle, there are disposed strips 21which reenforce and strengthen the drum to form bearings for receivingthe shaft or trunnion 11, said strips being preferably riveted orotherwise secured at the opposed sides of the drum so as to extendlongitudinally thereof for a considerable distance. The top of the drumis provided with a reenforced opening 22, a stiffening ring 23 beingdisposed around the edge of the opening, and suitably riveted to I thedrum for this purpose, and said opening being located centrallylof thelength of the drum as shown. The drum may be further provided with anopening 24 which may be closed by a hinged or othercover 25 having asuitable fastening means 26, it being understood that the drum ischarged through the opening 22 when the device is in a horizontalposition, or may be charged through the opening 2i when the drum is inan inclined position toward the end opposite to that provided with theopening 2%, so that the end at which this opening iS-PIOVlClQCl isuppermost and the opposite end lowermost. The cover is of course closedwhen the device is in use, as it is thought will be obvious.

One end of the drum is provided with a permanent wall 27 and theopposite end is provided with a hinged closure or end 28, hinged thetop, as indicated at 29, the end 2ibeing perinai'iently secured inposition and the hinged end or end piece 28 being adapted to cooperatewith a packing member 30, so that a liquid tightjoint is formed at saidend. That is, the upper portion of the end piece is fixed, whilethelower portion is designated at 31so' that the contents may bedischargedtrom the bottom thereof.

At thelower portion of the discharge door movement of the leverat theinner arm thereof, it being observed that the-lever is pivotedintermediatelyof its end, and nearer the outer end-thereof than theinner end thereof, so that the inner arm is longer than the outerwhereby but slight movement of the lever is required in moving to andfrom an engaging ordisengaging position. The longer arm of the lever atits inner end is adapted to engage and rest upon a releasing lever 39pivoted as shown at 40 to a bracket 41]. also suspended beneath the drumlike the bracket the inner end otth'elever 39 forming a hand hold bywhich the longer:

arm of the lever 33-may be elevated against the action of the spring 36,inv order to release the locking end of the lever from-the lug or catch3;, charged door 31 may swing to an open position or be locked innaclosed position. and held thereby.

Inorder to actuate themixing device, that I is, to oscillate the mixingdrum or receptacle, there is provided a drum orwlnding device i2 betweenthe uprights 12 about midway between the bottom of-the drum and the baseof the supporting frame, the same having an operating crank or handle43' by whereby the swinging dis-;

the same. One of the yokes is adapted to extend aroundithe locking leverand adjacent parts so as to not interi'ere with the operation oi thelatter, it being understood; that said yokes are rigid and theconnection of the extremities ot the cablest-herewith is made throughthe medium of rings or links #16, with interposed compensatingconnections or springs 47, in order to take up jar and shock, as thedrum 10 is oscillated and as the same changes itsmotion from one side tothe other.

In the operation of the device, the drum is filled with the material tobe mixed, preferably water first and then the concrete. gravel, sand orother material to be thoroughly agitated and intermixed, through theopening 22, the closure 25 and the swing: ing discharge door 31beingclosed. The iiiterior of the drum is provided with a series ofspaced battle blat es 4:8, preferably sloping in one direction towardthe discharge door 31, so that with the water placed be: neath theaggregate and other heavy contents, the water will drop first and thenthe aggregate, thus securing a thorough and rapid mixing with a minimumof labor, by merely agitatiiigthe contents through the medium ofoscillation of the mixing cylinder.

by turning the handcrank and its drum in opposite directions to thedesired extent.- This oscillatory movement is regulated byengagement'ofthe stop posts 16 at their. concaved ends 17 with the drum,it being understood that said concaved ends areimade to conform to thecontour of the drum in order to limit-the oscillatory movement of thedrum or its incline at either side. It

is of course to be understood thatwhen the hand crank or crank handleand the drum woundinone direction and unwound in the other, this causingthemixing the drum or receptacle to be oscillated in thejmanner of awalking beam through the medium of the extremities of the cableconnected to sufficiently dry and yet sufficiently Wet, if

the same is'not in theproper proportion or condition. If the mixture iscorrect, the discharge door may beopened to discharge 42 thereof ismanipulated, the cable will be.

the contents, and otherwise, the mixing operation must be continuedafter closing the cover 25, the required additional materials havingbeen previously charged therethrough. It will of course be understoodthat the inclined baflie blades 48 by being set at an angle, will notinterfere with the thorough mixing of the ingredients and discharge ofthe contents through the discharge door at one end of the mixing drum orre ceptacle, but will catch the material as the drum is oscillated ineither direction, owing to the positioning of said blades at the bottomof the drum or cylinder, so as to churn the concrete when dropping fromone end of the cylinder to the other so as to insure thorough agitation.In connection with the foregoing, it may also be stated that the windingdevice comprised by the drum 42, the cable 44 and the shank handle 43,constitutes a simple embodiment of the actuating means for the mixingdrum, cylinder or receptacle, it being understood that the winding drum42 is mounted on a shaft 49 rotatably journaled in the side members oruprights 12, the crank handle being secured to the shaft so that thesame may be manipulated to impart oscillatory movement thereto foralternately winding the drum in one direction while the other end isbeing unwound, and then winding the cable on the drum in the oppositedirection while the opposite end is being unwound, thus exertingopposite pull alternately on the ends of the mixing drum or cylinder tocause the latter to rock at either side and in oppositely inclinedpositions limited by the stop or limit posts 16 as heretofore specified.

It will thus be seen that I have provided a very simple and eflicientform of manually operated concrete mixer which requires but a smallexpenditure of power to manually manipulate the same, and which owing tothe length of the mixing drum, cylinder or receptacle, may be made tohave a relatively large capacity and yet thoroughly intermix thecontents in a very short time. While I have shown and described the formof the invention which now seems to be the preferred embodiment thereof,I desire to have it understood that I may make such changes in theconstruction thereof, as will be found covered by the device as setforth in the appended claim.

Having thus described the invention what I claim is:

In a mixing device, a support, a drum pivotally mounted intermediate itsends to permit the same to oscillate, a plurality of semi-circularspaced baflie blades positioned within the drum, the upper ends of thebattle blades terminating at points intermediate the top and bottom ofthe drum and means for oscillating the drum In testimony that I claimthe foregoing as my own, I have hereto afiixed my signature in thepresence of two witnesses.

JOSEPH W. HELTZEL.

Witnesses:

FRANK W. BOYLE, EDNA M. BOYLE.

